Finding the Fourth Proportional to 96,256.98, 144,288.51 and 40,128.15

Step by Step Solution

1. Step 1: Write the proportion equation
   96,256.98 : 144,288.51 = 40,128.15 : x
2. Step 2: Convert to fraction form
   96,256.98/144,288.51 = 40,128.15/x
3. Step 3: Cross multiply
   96,256.98x = 144,288.51 × 40,128.15
4. Step 4: Simplify right side
   96,256.98x = 5,790,030,972.56
5. Step 5: Solve for x
   x = 5,790,030,972.56/96,256.98
6. Step 6: Final answer
   x = 60,151.80